The top seeds here are Rafael Nadal and the reigning champion Monaco, who is
Nadal's doubles partner this week. Both players received opening-round singles
byes, but won their opening doubles match Tuesday, 6-3, 6-2, against a duo of
Frantisek Cermak and Lukas Dlouhy.

Nadal is playing his first tennis since last June after being sidelined with
a knee injury. The Spanish great, who owns 11 Grand Slam titles, including a
record seven French Open championships in the Open Era, is appearing in a
South American tournament for the first time since 2005, when he won a title
in Brazil as an 18-year-old.

The former world No. 1 Nadal will open his singles Vina del Mar stay on
Wednesday against qualifier Federico Delbonis, who fought back to best fellow
Argentine Guido Pella, 2-6, 7-6 (7-4), 7-6 (7-1), on Day 1.